Quantitative Analysis of Soda Ash by Double Indicator Titration
Quantitative Analysis of Soda Ash by Double Indicator Titration
Quantitative Analysis of Soda Ash by Double Indicator Titration
(1)
(2)
(3)
3
0.1026
42.2
0.0458
% NaHCO3
19.7 %
9.95 %
10.1 %
1015 ppt
25.1 %
APPENDIX
SAMPLE CALCULATIONS
A. Standardization of Hydrochloric Acid Solution
mol
MHCl , L
mg
% purity
)
FW Na2 CO3
100
2(
VHCl ,mL
0.0002 2
109 mg
0.999
105.98844 g/mol
42.1 mL
= .
0.1 2
mol
L
= .
(mmolFW)Na2CO3
mgsample
100% =
(mmolFW)NaHCO3
mgsample
(0.258)(105.98844)
132.4
100% =
100% = . %
(0.262)(106.99638)
132.4
100% = . %
C. Statistics
Range = 20.7 18.5 = .
Mean =
20.7+18.5+18.7
3
= .
(20.719.3)2 +(18.519.3)2 +(18.719.3)2
Standard deviation =
31
1.22
(4.30)(1.22)
3
= . . %
= .